CN212476450U - Sewage treatment system - Google Patents
Sewage treatment system Download PDFInfo
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- CN212476450U CN212476450U CN202020584129.2U CN202020584129U CN212476450U CN 212476450 U CN212476450 U CN 212476450U CN 202020584129 U CN202020584129 U CN 202020584129U CN 212476450 U CN212476450 U CN 212476450U
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Abstract
The application relates to a sewage treatment system. The sewage treatment system comprises a pretreatment device and a catalytic electrolysis device which are connected through a pipeline, wherein the pretreatment device is selected from one or more of a filtering device, a coagulation sedimentation tank, an adjusting tank, an acid-base neutralization tank, an evaporation tank, a hydrolysis-acidification tank, a physicochemical pretreatment device and a biological pretreatment device, the catalytic electrolysis device is provided with a power supply unit, a control unit and an electrode assembly, the electrode assembly is connected with the power supply unit and the control unit, the electrode assembly comprises an electrode plate and a connecting piece, the electrode plate comprises a cathode plate and an anode plate with a catalyst film layer, the connecting piece is used for connecting the cathode plate and the anode plate with the catalyst film layer, and the electrode assembly is used for carrying out catalytic electrolysis on sewage. When the treatment system of the application is used for treating sewage, the oxidizing substances generated by catalytic electrolysis are used for degrading pollutants, algae, viruses, bacteria and microorganisms in the sewage.
Description
Technical Field
The application relates to the field of water treatment, in particular to a sewage treatment system.
Background
Sewage treatment is a process of purifying sewage to meet the water quality requirement of discharging the sewage into a certain water body or reusing the sewage. Sewage treatment is widely applied to various fields such as buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like. The methods for treating sewage can be generally classified into physical methods, chemical methods, biological methods, and the like. Because the quality and the quantity of the sewage in different industries are greatly different, the sewage treatment methods and the processes for the sewage in different industries and the sewage with different quantities in the same industry are also different.
SUMMERY OF THE UTILITY MODEL
The application aims at providing a sewage treatment system.
The application provides a sewage treatment system, which comprises a pretreatment device and a catalytic electrolysis device which are connected by a pipeline,
the pretreatment device is one or more selected from a filtering device, a coagulating sedimentation tank, an adjusting tank, an acid-base neutralization tank, an evaporation tank, a hydrolysis-acidification tank, a physicochemical pretreatment device and a biological pretreatment device,
the catalytic electrolysis device is provided with a power supply unit, a control unit and an electrode assembly, the electrode assembly is connected with the power supply unit and the control unit,
the electrode assembly comprises an electrode plate and a connecting piece, wherein the electrode plate comprises a cathode plate and an anode plate with a catalyst film layer, the connecting piece is used for connecting the cathode plate and the anode plate with the catalyst film layer, and the electrode assembly is used for carrying out catalytic electrolysis on the sewage to generate oxidizing substances.
Optionally, the processing system according to the above, wherein,
the electrode plates are provided with diversion holes;
the electrode assembly is connected to the housing of the catalytic electrolysis device.
Optionally, the processing system according to the above, wherein,
the electrode assembly comprises at least one cathode plate and at least one anode plate with a catalyst membrane layer;
the connecting piece is also used for connecting a plurality of electrode plates.
Optionally, the treatment system according to above, wherein the connector is selected from one or more of an anode plate conductive connector, a cathode and anode plate insulating spacer and a bracket;
the anode plate conductive connecting piece is respectively connected with the anode plate with the catalyst film layer and the power supply unit;
the negative plate conductive connecting piece is respectively connected with the negative plate and the power supply unit;
the cathode plate and the anode plate are respectively connected with the cathode plate and the anode plate with the catalyst film layer;
the support supports the electrode plate, a polar plate positioning groove is formed in the support and used for fixing the electrode plate.
Optionally, the processing system according to the above, wherein the control unit is adapted to control the rate and amount of the oxidizing substance in an analog and/or digital analog manner.
Optionally, the treatment system according to the above, wherein the biological pretreatment treatment device is selected from one or more of biochemical treatment, bioflocculation treatment, biosorption treatment, aerobic biological treatment and anaerobic biological treatment device,
the physicochemical pretreatment device is one or more of coagulation, air flotation, air stripping, adsorption, ion exchange, evaporation and membrane filtration treatment devices.
Optionally, the treatment system further comprises a post-treatment device connected to the catalytic electrolysis device, wherein the post-treatment device is selected from one or more of a filtering device, a coagulating sedimentation tank, an activated carbon adsorption device, an aerobic microorganism treatment tank and a membrane treatment device.
Optionally, the processing system according to the above, wherein,
the catalyst is prepared by the following steps:
in SnC2O4Adding deionized water into the materials, and uniformly stirring to obtain a first slurry;
adding Sb into the first slurry2O3Heating and uniformly stirring to obtain a second slurry;
heating the second slurry, and adding Ni (CH) into the second slurry3COO)2·4H2O and/or Co (CH)3COO)2·4H2O and/or Cu (CH)3COO)2·H2O and/or Fe (CH)3COO)2Uniformly stirring to obtain a third slurry;
heating the third slurry to 50-90 ℃, adding hydrogen peroxide, continuously stirring until the reaction is finished, stopping heating, taking the upper suspension after the materials are completely precipitated to obtain the catalyst,
and loading the catalyst on the anode plate by a sintering mode to prepare the anode plate with the catalyst membrane layer.
Optionally, the processing system of above, wherein the SnC2O4Adding deionized water into the materials, and uniformly stirring to obtain a first slurry, which comprises:
400-1500 parts by weight of SnC2O4Adding 400-1600 parts by weight of deionized water, and uniformly stirring to obtain the first slurry.
Optionally, the processing system according to the above, wherein said adding Sb into said first slurry2O3And heating and uniformly stirring to obtain a second slurry, which comprises the following steps:
adding 20-100 parts by weight of Sb into the first slurry2O3Heating ofAnd (4) stirring uniformly to 40-50 ℃ to obtain the second slurry.
When the treatment system of the application is used for treating sewage, the oxidizing substances generated by catalytic electrolysis are used for degrading pollutants, algae, viruses, bacteria and microorganisms in the sewage. Because the catalytic electrolysis belongs to electrochemical reaction, the speed is high, the efficiency is high, and therefore, the sewage treatment system has high sewage treatment efficiency and short treatment time.
Drawings
FIG. 1 is a flow chart of a method for treating wastewater according to an embodiment of the present application;
FIG. 2 is a process for preparing a catalyst provided herein;
FIG. 3 is a schematic structural view of a sewage treatment system according to an embodiment of the present application;
FIG. 4 is a schematic structural view of a sewage treatment system according to an embodiment of the present application;
FIG. 5 is a schematic structural view of a sewage treatment system according to an embodiment of the present application;
FIG. 6 is a schematic structural view of a sewage treatment system according to an embodiment of the present application;
FIG. 7 is a schematic structural view of a sewage treatment system according to an embodiment of the present application;
FIG. 8 is a schematic structural view of a sewage treatment system according to an embodiment of the present application.
Detailed Description
The following detailed description of the present application, taken in conjunction with the accompanying drawings and examples, is provided to enable the aspects of the present application and its advantages to be better understood. However, the specific embodiments and examples described below are for illustrative purposes only and are not limiting of the present application.
The execution sequence of each step in the method mentioned in this application is not limited to the sequence presented in the text unless otherwise specified, that is, the execution sequence of each step may be changed, and other steps may be inserted between two steps as required.
As used herein, the terms "connected," "coupled," and the like, unless otherwise expressly specified or limited, are intended to be broadly construed, and can include direct connection, connection through an intermediate, and communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In the description of the present application, it is to be understood that the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", "top", "bottom", and the like are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The application provides a sewage treatment method, which comprises the following steps:
s110, sewage is pretreated. The pretreatment can remove particles or colloids in the water body, such as acid-base neutralization, grid filtration, coagulating sedimentation, evaporation, hydrolytic acidification, mixing homogenization and the like.
S120, under the action of the electrode coated with the catalyst, the sewage is catalyzed and electrolyzed to generate oxidizing substances. Catalytic Electrolysis refers to the preparation of oxidizing substances by catalytic Electrolysis (Catalysis and Electrolysis), i.e., the efficiency of electrode catalytic oxidation (such as some metal oxide catalysts) is effectively promoted by adding a proper catalyst in an Electrolysis device.
S130, contacting the sewage with the oxidizing substance. In this step, the sewage is treated with gaseous and/or liquid oxidizing substances generated in step S120. The oxidizing substances generated by electrolysis can react with organic matters, nitrogen, phosphorus and other substances in water, and can also quickly kill microorganisms such as algae, viruses, bacteria and the like.
Unless otherwise specified, the present application does not limit the order of the steps in the above method, and for example, S110 may be performed first and then S120 may be performed, or S120 may be performed first and then S110 may be performed.
FIG. 1 is a flow chart showing a method for treating wastewater according to an embodiment of the present invention.
Referring to fig. 1, the method for treating wastewater of the present application includes, in addition to steps S110, S120, and S130: s140, performing post-treatment on the sewage after the contact with the oxidizing substance, for example, filtering to further remove particles in the water; coagulating sedimentation to remove colloids in the water body; activated carbon adsorption, which depends on the huge specific surface area of activated carbon to adsorb pollutants in water. Also, for example, aerobic microbial treatment and membrane treatment can be used. The post-processing can effectively reduce the processing load and the use cost, especially after the step S130.
According to some embodiments, step S120 further comprises performing catalytic electrolysis on the pollutants in the wastewater under the action of the electrode plates coated with the catalyst, wherein the pollutants comprise benzene, ammonia nitrogen and/or diethyl phosphate.
The reaction of the above-mentioned pollutants for catalytic electrolysis is, for example, as follows:
5O3+C6H6＝6CO2+3H2O；2NH3+O3＝N2+3H2O；·OH+NH3＝H2O+·NH2；·OH+·NH2＝NH2OH
C4H11O4P+4O3＝4CO2+4H2O+H3PO4。
according to some embodiments, in step S120, the sewage flow rate is300～600m3The COD concentration of the sewage is 180-200 mg/L, 100-240 groups of the cathode plates and the anode plates coated with the catalyst are adopted, the size of the cathode plates and the anode plates is 100 x 5mm, the current is 900-1100A, the voltage is 5-10V, and the catalytic electrolysis time is 1h. The COD value of the sewage after catalytic electrolysis is less than 30 mg/L.
According to some embodiments, step S120 is performing catalytic electrolysis on the wastewater using a catalytic electrolysis apparatus. The catalytic electrolysis device is provided with a power supply unit and an electrode assembly, the electrode assembly is connected with the power supply unit, the electrode assembly comprises an electrode plate, the electrode plate comprises a cathode plate and an anode plate with the catalyst film layer, and the power supply unit is used for supplying power to the catalytic electrolysis device. The electrode plate is in be vertical the placing among the catalytic electrolysis device in the catalytic electrolysis, sewage by catalytic electrolysis device's bottom gets into, flows through from bottom to top the electrode plate improves the contact efficiency of pollutant in the sewage and this device electrolysis product, promotes the reaction.
The scale of the catalytic electrolysis device is determined by the volume of the sewage and the concentration of pollutants in the sewage, and the scale comprises the size of a space for accommodating the sewage, the number of the electrode assemblies and the operating conditions of the electrode assemblies. The operating conditions of the electrode assembly such as current, voltage, etc. For example, when the sewage water amount is 500-800 m3The COD concentration is 150-200 mg/L, the concentration needs to be reduced to below 50mg/L, the catalytic electrolysis treatment time is 1h, and the space for accommodating the sewage of the catalytic electrolysis device is 600-1000 m3100 to 240 electrode assemblies, wherein the size of the electrode assembly is 100 x 5mm, the current is 500 to 1200A, the voltage is 5 to 10V, and the generation rate of the oxidizing substance is 100 to 120 g/h.
Catalytic electrolysis plays a major role in the treatment method, and the oxidizing substances generated by catalytic electrolysis can degrade pollutants, algae, viruses, bacteria and microorganisms in water. Because the catalytic electrolysis belongs to electrochemical reaction, the speed is high, the efficiency is high, and the sewage treatment efficiency and the treatment time are short by adopting the treatment method. And the catalytic electrolysis technology has stable performance, so the treatment method is not influenced by the pollution degree of water.
According to an exemplary embodiment, the catalytic electrolysis reaction is mainly:
and (3) anode reaction:
H2O－e－＝·OH+H+
3·OH－3e－＝O3+3H+
and (3) cathode reaction:
O2+2H++2e-＝H2O2
in the reaction process, oxygen required by the cathode reaction is oxygen continuously dissolved in the water body. H required for the cathodic reaction+H from water and anodic reaction+. Under the catalysis of the catalyst, no harmful gas is generated in the electrolysis process. It can be seen that under the action of the electrode plate coated with the catalyst, the oxidizing substances OH and O can be generated3And H2O2。
The oxidizing substances generated by the reaction not only can decompose various aromatic hydrocarbons and unsaturated chain hydrocarbons such as polychlorobiphenyl, phenol, naphthalene and the like which are not easy to degrade, but also can quickly kill microorganisms such as algae, viruses, bacteria and the like, and microbubbles generated in the reaction process can quickly remove insoluble granular substances by air flotation, so the method can be used for treating sewage.
Fig. 2 illustrates a method of making a catalyst provided herein.
Referring to fig. 2, according to an exemplary embodiment, the catalyst is prepared by:
(1) go SnC2O4Adding deionized water, and stirring uniformly to obtain a first slurry.
For example, 400 to 1500 parts by weight of SnC2O4Adding 400-1600 parts by weight of deionized water, and stirring for 5-10 min to be uniform to obtain the first slurry.
Alternatively, other Sn-containing divalent compounds can be used instead of SnC2O4。
(2) Adding Sb into the first slurry2O3And heating and uniformly stirring to obtain a second slurry.
For example, 20 to 100 parts by weight of Sb may be added to the first slurry2O3And heating to 40-50 ℃, and stirring for 5-10 min to be uniform to obtain the second slurry.
Alternatively, it is also possible to select other Sb-containing orthotrivalent compounds instead of Sb2O3。
(3) Heating the second slurry, and adding Ni (CH) into the second slurry3COO)2·4H2And O, uniformly stirring to obtain a third slurry.
For example, the second slurry may be heated to 40 to 50 ℃, and then 1 to 3 parts by weight of Ni (CH) may be added3COO)2·4H2And O, uniformly stirring to obtain a third slurry. At this temperature, Ni (CH)3COO)2·4H2O can be better dissolved in the system.
Alternatively, other Ni-containing divalent compounds can also be selected instead of Ni (CH)3COO)2·4H2O, or other acetoxy compounds may be selected, for example: co (CH)3COO)2·4H2O and/or Cu (CH)3COO)2·H2O and/or Fe (CH)3COO)2。
Alternatively, (3) may be:
heating the second slurry to 40-50 ℃, and then adding 1-3 parts by weight of Ni (CH)3COO)2·4H2O, and continuing heating;
adding 1-3 parts by weight of Co (CH) when the temperature reaches 50-60 DEG C3COO)2·4H2O or Cu (CH)3COO)2·H2And O, uniformly stirring to obtain a third slurry. At this temperature, a third slurry with a more uniform distribution and smaller particles is obtained.
Or, alternatively, (3) may be:
heating the second slurry to 50-60 ℃, and then adding 1-3 parts by weight of Cu (CH)3COO)2·H2O，And uniformly stirring to obtain a third slurry.
Or, alternatively, (3) may be:
heating the second slurry to 40-50 ℃, and then adding 1-3 parts by weight of Ni (CH)3COO)2·4H2O, and continuing heating;
adding 3-5 parts by weight of Fe (CH) when the temperature reaches 50-60 DEG C3COO)2And uniformly stirring to obtain the third slurry.
(4) And heating the third slurry to 50-90 ℃, adding hydrogen peroxide, continuously stirring until the reaction is finished, stopping heating, and taking the upper suspension after the materials in the reaction kettle are completely precipitated to obtain the catalyst.
In the application, hydrogen peroxide is added into the heated third slurry, so that the added materials can be more thoroughly oxidized, and the catalyst with better performance is obtained.
For example, the third slurry can be heated to 50 ℃ to 90 ℃, then 5 to 70 parts by weight of hydrogen peroxide is added, the heating is stopped after the stirring is continued for 1h to 3h, and the upper suspension is taken after the materials in the reaction kettle are completely precipitated, so as to obtain the catalyst.
Optionally, the concentration of the hydrogen peroxide is 3-70%. At this concentration, the material can be oxidized to a certain extent and the obtained catalyst is optimal in effect.
According to some embodiments, in the catalytic electrolysis in step S120, the oxidizing substance generation rate is related to the current, the number of electrode assemblies, and the like. For example, the number of electrode assemblies is 30, the size of the electrode assembly is 100 × 5mm, the voltage is 12V, the current is 150A, and the oxidizing substance generation rate is 162g/h.
According to some embodiments, the treatment time of the catalytic electrolysis in step S120 is related to the generation rate of the oxidizing substance, the volume of the sewage to be treated, and the degree of pollution of the sewage to be treated. For example, the pond water volume is 800m at an oxidizing substance generation rate of 162g/h3And the COD concentration in the water is 150mg/L, and the three types of water can reach the surface water quality standard after running for 48 hours according to the method, namely the COD is less than 20 mg/L.
According to some embodiments, the pretreatment in step S110 is selected from one or both of a physicochemical pretreatment and a biological pretreatment. The physicochemical pretreatment is one or more of coagulation, air flotation, air stripping, adsorption, ion exchange, evaporation and membrane filtration, and is mainly used for removing colloidal substances, particles with small size, industrial deamination, recovering important raw materials, removing salt and the like in water. The biological pretreatment is selected from one or more of biochemical treatment, biological flocculation treatment, biological adsorption treatment, aerobic biological treatment and anaerobic biological treatment, and is mainly used for removing nitrogen and phosphorus in water, removing heavy metals, decomposing macromolecular organic matters into micromolecular organic matters and the like.
According to some embodiments, step S110 is followed by step S140 of post-treating the wastewater after contacting with the oxidizing substance, which may include, for example, filtering to further remove particulate matter from the wastewater; coagulating sedimentation to remove colloids in the water body; activated carbon adsorption, which depends on the huge specific surface area of activated carbon to adsorb pollutants in water. For example, aerobic microorganism treatment, anaerobic microorganism treatment and membrane treatment can also be used. The post-processing can effectively reduce the processing load and the use cost, especially after the step S130.
According to the sewage from different sources, the steps of the sewage treatment method can be selected and adjusted to adapt to the characteristics of different types of sewage, so that the sewage can be treated more efficiently.
For example, when the sewage is water for landscape entertainment, the treatment method comprises the following steps:
and filtering the sewage.
And carrying out catalytic electrolysis on the pretreated sewage under the action of an electrode coated with a catalyst to generate an oxidizing substance.
And the pretreated sewage is contacted with the oxidizing substance.
And filtering, coagulating sedimentation and/or adsorbing the sewage contacted with the oxidizing substances by using activated carbon.
The water for landscape entertainment is used for a river, a lake (reservoir), a seawater body or a part of the water body for landscape, recuperation, vacation and entertainment. The water treatment process for landscape entertainment on the market generally adopts the flow of filtering → sterilizing and disinfecting (such as ultraviolet, chlorination and the like) → microorganisms or directly filtering → microorganisms, namely, particle insoluble substances in the water for landscape entertainment are removed by filtering, microorganisms such as algae in the water are killed by ultraviolet and chlorine-containing disinfectants and the like, and in addition, pollutants (such as organic matters, nitrogen, phosphorus and the like) in the water are decomposed by culturing specific microorganisms such as nitrobacteria and the like. However, the current process of filtering → sterilizing → microorganism has some inevitable problems in practical application. For example, depending on the degree of contamination of the water, the material that is responsible for the filtration may become clogged to varying degrees, and if not replaced (or cleaned) in time, the treatment effect may be compromised. The ultraviolet sterilization effect is influenced by the distance, the sterilization effect is good only near the surface of the ultraviolet lamp, and the ultraviolet sterilization effect can be interfered when the transparency of the water body is not high. Nitrifying bacteria (microorganisms) are one of the widely used techniques in water treatment, and are inexpensive, but the bacteria, as organisms, have many factors affecting their growth (metabolism), such as temperature, nutrient concentration, pH, etc., and have a long period of time (usually more than one month) for metabolizing decomposed substances by the microorganisms.
In order to solve the technical problems, the application provides a novel process flow for treating the water body by decomposing pollutants in the water body and then refluxing the water or using the water as other use, discharging and the like through a treatment flow of 'pretreatment filtration → catalytic electrolysis → filtration'. The core technology, namely the catalytic electrolysis oxidation technology, can be used for directly generating oxidants (ozone, hydroxyl, hydrogen peroxide and the like) in water through catalytic electrolysis. According to the treatment method provided by the application, pollutants, algae, peculiar smell, odor and the like in the sewage can be effectively removed only by filtering → catalytic electrolysis → filtering.
For another example, when the wastewater is aquaculture wastewater, the above wastewater treatment method may include:
the sewage is filtered to remove coarse particles, suspended matters and the like in the sewage.
The filtered wastewater is subjected to pretreatment such as physical and chemical pretreatment and biological pretreatment.
And under the action of a catalyst, carrying out electrolytic oxidation on the pretreated sewage to generate an oxidizing substance.
And the pretreated sewage is contacted with the oxidizing substance.
The treatment method is particularly suitable for treating aquaculture sewage. Compared with urban domestic sewage and industrial wastewater, aquaculture water pollution has unique characteristics, such as low content of potential pollutants, large primary drainage, difference with common land-source sewage, and great increase of treatment difficulty. In the prior art, the methods for treating aquaculture sewage mainly comprise physical treatment methods, chemical treatment methods, physicochemical treatment methods and the like. Although these methods are well established methods for treating aquaculture wastewater, various methods have certain limitations and are difficult to completely remove contaminants from aquaculture wastewater. Such as physical treatment method, wherein the filtration method can only remove the residual feed and excrement in the culture sewage, and the small particle pollutants are difficult to remove; although the chemical agent added in the chemical treatment method can specifically remove pollutants in the chemical treatment method, the chemical agent can cause secondary pollution and is high in cost. The treatment method has simple flow and low operation cost, and the generated oxidizing substances are green and have no residue, and no medicament is required to be added in the whole process, so that secondary pollution is not introduced.
For another example, when the wastewater is brewery wastewater, the above-mentioned wastewater treatment method may include:
filtering and deslagging the sewage to remove coarse-grained suspended matters in the sewage, wherein the suspended matters can be recovered as feed or fertilizer
And (3) homogenizing and mixing the filtered sewage. The wine production takes water as a medium, and takes white wine as an example, the produced wastewater can be divided into two parts, wherein one part is high-concentration organic wastewater (comprising distillation pot bottom water, fermentation blind ditch water, distillation section ground washing water, underground wine cellar leakage water, washing water and soaking water during the wine making process operation and the like), is a colloidal solution, and has high organic matters and suspended matters; the other part is low-concentration organic wastewater comprising cooling water, cleaning water and the like. And (3) carrying out homogeneous mixing on the high-concentration wastewater and the low-concentration wastewater, and ensuring stable water inflow in subsequent links.
And carrying out biological pretreatment on the sewage after the homogeneous mixing so as to degrade total nitrogen in the sewage, and degrading macromolecular organic matters into micromolecular organic matters so as to improve the biodegradability of the wastewater and improve the subsequent biological treatment link or electrolytic oxidation effect.
And carrying out electrolytic oxidation treatment on the sewage after the primary pretreatment. Under the action of a catalyst, the sewage is subjected to electrolytic oxidation to generate a strong oxidizing substance. Reducing COD, and removing organic substances, inorganic substances, nitrogen and phosphorus; simultaneously, the wastewater is decolorized and deodorized. Finally, the requirements of discharge or reuse are met.
Although the treatment of the brewing wastewater in China has been explored for more than ten years, the overall situation is not satisfactory. Firstly, the pollution control proportion in the wine making industry is low, and the waste water of many small-sized wine factories in villages and towns is not treated at all. Secondly, large-scale liquor industry waste water treatment facilities have high one-time investment, complex process, long debugging time, high management requirement and high treatment cost. Many winery wastewater treatment processes often do not achieve the desired results or require continuous technical modification or even reconstruction due to insufficient extension loads. Compared with the existing treatment process, the treatment method is simple, stable in treatment effect, low in running cost, simple and easy to operate and maintain, small in occupied area and low in investment cost. In addition, the electrolytic oxidation tank used in the treatment method has high load capacity, and can flexibly regulate and control complex water quality.
The application also discloses a treatment system for treating sewage by adopting the method.
Figure 3 shows a schematic structural diagram of one embodiment of the processing system.
Referring to fig. 3, the treatment system illustratively includes a pretreatment unit 31 and a catalytic electrolysis unit 32 connected in series.
The pretreatment device 31 may be, for example, a filtration device for removing insoluble particles and the like in the sewage, and may include a conditioning tank, a biological pretreatment device, a physicochemical pretreatment device, and/or a coagulation sedimentation tank. The structure of the filtering device comprises a water inlet, a filtering layer, a water outlet and a filter residue collecting device.
According to some embodiments, the pretreatment apparatus is a physical-chemical pretreatment apparatus selected from one or more of coagulation, air flotation, air stripping, adsorption, ion exchange, evaporation and membrane filtration treatment apparatuses.
According to some embodiments, the pretreatment apparatus is a biological pretreatment apparatus selected from one or more of a biochemical treatment, a bioflocculation treatment, a biosorption treatment, an aerobic biological treatment and an anaerobic biological treatment apparatus.
The catalytic electrolysis device 32 is provided with a power supply unit, a control unit, and an electrode assembly connected to the power supply unit and the control unit. An electrode assembly. The electrode assembly comprises an electrode plate and a connecting piece, wherein the electrode plate comprises a cathode plate and an anode plate with a catalyst film layer, the connecting piece is used for connecting the cathode plate and the anode plate with the catalyst film layer, and the electrode assembly is used for carrying out catalytic electrolysis on the sewage to generate oxidizing substances.
According to some embodiments, the power supply characteristic of the power supply unit may be one or more of a constant voltage, a constant current, and a constant power.
According to some embodiments, the base layer of the anode plate is a high temperature and corrosion resistant conductive material, such as titanium metal, ceramic, etc., and the catalyst is coated on the surface thereof, and then pyrolysis is performed, and the coating and pyrolysis are repeated to obtain the catalyst film layer. And sintering the catalyst film layer to obtain the anode plate.
Pyrolysis and sintering may be performed in a muffle furnace. Optionally, the pyrolysis temperature is 300-500 ℃, and the pyrolysis time is 1-4 h. Optionally, the sintering temperature is 600-700 ℃, and the sintering time is 60-120 min. Optionally, the coating-pyrolysis is repeated 6-12 times.
According to some embodiments, the cathode plate is made of a corrosion-resistant electrically conductive material.
The electrode assembly is low in manufacturing cost, and expensive materials such as platinum (Pt) and a conductive diamond film do not need to be used; simple structure, and flexible and convenient production and use. When the electrode assembly is used, sewage is directly electrolyzed by the electrode assembly, and generated oxidizing substances are very fine, so that the contact area of a water body is increased to the maximum extent; no toxic and harmful substances are generated (lead and accessory oxides thereof, oxynitride and the like); the efficiency is high, and the yield is maximum under the same unit energy consumption; the anode can be repeatedly processed and used, so that the material loss is greatly saved; simple maintenance and low cost.
Optionally, an anode plate and two cathode plates are taken, the anode plate and the cathode plate are separated by adopting an insulating material, and the electrode assembly is obtained after assembly. Of course, the electrode assembly of the present application may have other forms as long as it includes the above three components, and the present application is not particularly limited.
Optionally, the electrode plates are distributed with flow guiding holes, for example, in an electrode plate with a specification of 50 × 5mm, the number of flow guiding holes is 50, the flow guiding holes are uniformly distributed in an equidistant manner, the diameter of each hole is 0.5mm, and the hole pitch is 1 mm. The effect of water conservancy diversion hole is used for even rivers to ensure that hydrone and plate electrode fully contact to improve the stability of electrode work, improve the contact efficiency of pollutant in the sewage and this device electrolysis product, promote the reaction.
Optionally, the electrode assembly is coupled to a housing of the catalytic electrolysis device.
Optionally, the connector is selected from one or more of an anode plate conductive connector, a cathode plate conductive connector, a plate positioning slot, a cathode and anode plate insulation partition and a bracket. The anode plate conductive connecting piece is respectively connected with the anode plate with the catalyst film layer and the power supply unit. The negative plate conductive connecting piece is respectively connected with the negative plate and the power supply unit. The cathode plate and the anode plate are respectively connected with the cathode plate and the anode plate with the catalyst film layer for preventing the cathode plate and the anode plate from short circuit and protecting the normal operation of the device. The support supports the electrode plate, a polar plate positioning groove is formed in the support and used for fixing the electrode plate.
Optionally, the treatment system further comprises a post-treatment device connected with the catalytic electrolysis device, wherein the post-treatment device is selected from one or more of a filtering device, a coagulating sedimentation tank, an activated carbon adsorption device, an aerobic microorganism treatment tank and a membrane treatment device.
Fig. 3B is a front view of a structural schematic diagram of an electrode assembly 320 according to an embodiment of the present application, and fig. 3C is a top view of the structural schematic diagram of the electrode assembly 320.
As shown in fig. 3B and 3C, the electrode assembly 320 includes a cathode plate 321, an anode plate 323 with a catalyst film layer, a holder 326, a cathode conductive connection member 322, an anode conductive connection member 324, and an anode and cathode plate insulating spacer 325. The holder 326 is provided with a plate positioning groove 3260. The cathode plate and the anode plate of the distribution diversion hole 3210 are arranged at intervals and fixed in the plate positioning groove 3260 on the bracket 326. The anode plate 323 is connected to the power supply unit through an anode conductive connection member 324. The cathode plate 321 is connected to the power supply unit through a cathode conductive connector 322. The cathode and anode plates 325 are connected to the cathode plate 321 and the anode plate 323, respectively.
According to some embodiments, the catalytic electrolysis device is an electrolytic oxidation cell 32, the structure of which is schematically illustrated in FIG. 3D. Fig. 3 is a top view of the electrolytic oxidation cell 32, which includes a power supply unit (not shown), a control unit (not shown), a water inlet pipe 321, and a plurality of sets of electrode assemblies 320. The electrode assembly structure 320 is the same as the electrode structure of fig. 3B-3C, and will not be described again. The electrode plates in the electrode assembly are vertically arranged in the electrolytic oxidation tank. The water inlet pipe 321 is disposed at the bottom of the electrolytic oxidation cell, below the electrode assembly 320. The wall of the water inlet pipe 321 is distributed with water inlets. When the catalytic electrolysis is carried out, sewage enters the electrolytic oxidation tank through the water inlet of the water inlet pipe 321 and flows through the electrode plate from bottom to top.
The work flow of the sewage treatment by adopting the treatment system comprises the following exemplary steps:
and (4) pretreating the sewage by adopting a pretreatment device.
And (3) carrying out catalytic electrolysis on the pretreated sewage by using a catalytic electrolysis device so as to remove harmful substances. The anode of the power supply unit is connected with the anode plate of the catalytic electrolysis device through a lead, the cathode of the power supply unit is connected with the cathode plate of the catalytic electrolysis device through a lead, and the anode plate and the cathode plate are both inserted into the sewage after pretreatment. The anode plate and the cathode plate are separated by insulating materials. When the power supply unit is electrified, cations in the water body move to the cathode to absorb electrons, so that reduction is carried out, and oxidizing substances can be generated; the anions in the water body move to the anode to release electrons, oxidation is carried out, and oxidizing substances can be generated.
The generated oxidizing substances and the sewage after the pretreatment are contacted in a catalytic electrolysis device.
According to some embodiments, the treatment system of the present application further comprises a post-treatment device, which may comprise, for example, a filtration device, or a coagulation sedimentation tank and/or an activated carbon adsorption device. The structure of the filtering device comprises a water inlet, a filtering layer, a water outlet and a filter residue collecting device.
Figure 4 shows a schematic structural diagram of one embodiment of the processing system.
Referring to fig. 4, the treatment system illustratively includes a pretreatment device 41, a catalytic electrolysis device 42, a post-treatment device 43, a control unit 44, a power supply unit 45, and an auxiliary device 46.
The pretreatment device 41, the catalytic electrolysis device 42, and the post-treatment device 43 are connected in this order. The power supply unit 45 is used to supply power to the processing system. The auxiliary device 46 is at least one selected from an energy auxiliary device, an auxiliary adding device, a detection device, a stirring device, a mixing device and an extraction device, and is used for being matched with other devices to treat sewage.
The control unit 44 is used to control other devices of the processing system. For example, the control unit 44 may control the rate of production of the oxidizing substance from the catalytic electrolysis device, in this embodiment primarily in an analog and/or digital analog manner.
Fig. 5 shows a schematic diagram of a structure of the processing system.
Referring to fig. 5, the treatment system illustratively includes a coarse filter device 51, a fine filter device 52, and a catalytic electrolysis device 53 connected in series. The treatment system is suitable for treating water for landscape entertainment.
Fig. 6 shows another schematic of the processing system.
Referring to fig. 6, the treatment system illustratively includes a filter unit 61, a pretreatment unit 62, and an electrolytic oxidation cell 63 (corresponding to a catalytic electrolysis unit).
The filter device 61 may be, for example, a drum filter for removing coarse particles, suspended substances, etc. from the sewage.
The pretreatment device 62 is selected from one or two of a physical and chemical pretreatment device and a biological pretreatment device, for example, to improve the efficiency of the subsequent treatment process.
The electrolytic oxidation cell 63 is provided with an electrode assembly for generating oxidizing substances and bubbles in the sewage. The oxidizing substances can decolor the sewage, remove peculiar smell, degrade organic matters and ammonia nitrogen, and synchronously sterilize and disinfect. And the bubbles can wrap suspended matters in the sewage and float to the water surface, and the suspended matters can be removed by removing floating foam.
When the treatment system is used for treating sewage, the sewage is treated by the filtering device 61, the pretreatment device 62 and the electrolytic oxidation tank 63 in sequence, and the sewage can be discharged or recycled after reaching the standard.
According to some embodiments, the pretreatment device is a physicochemical pretreatment device selected from one or more of coagulation, air flotation, air stripping, adsorption, ion exchange, evaporation and filtration devices, and is mainly used for removing colloidal substances, fine-sized particles, industrial deamination, recovery of important raw materials, removal of salts, and the like in water.
According to some embodiments, the pretreatment apparatus is a biological pretreatment apparatus selected from one or more of biochemical treatment, bioflocculation treatment, bioadsorption treatment, aerobic biological treatment, and anaerobic biological treatment apparatus, which is mainly used for removing nitrogen, phosphorus, heavy metals, decomposition of macromolecular organic substances into small molecular organic substances, and the like in water. The sewage treatment system is compact in occupied space and low in operation cost, the products of the electrolytic catalysis assembly are green and have no residue, and no medicament is required to be added in the whole process, so that secondary pollution is avoided.
Fig. 7 shows another schematic of the processing system.
Referring to fig. 7, the treatment system illustratively includes a filtration device 71, a conditioning tank 72, a flotation treatment tank 73, an anaerobic treatment tank 74, and an electrolytic oxidation tank 75 (corresponding to an electrolytic oxidation device) connected in this order. The treatment system is particularly suitable for treating winery wastewater. The adjusting tank 72 is used for mixing and homogenizing high-low wastewater, and stable water inlet in subsequent links is guaranteed. The air floatation treatment tank is used for carrying out sewage air floatation treatment and removing fine particles. The anaerobic treatment tank carries out anaerobic treatment on the sewage, can remove partial organic matters, hydrolyzes macromolecular organic matters into micromolecular organic matters, and improves the effect of the subsequent treatment link.
FIG. 8 shows another schematic of a treatment system suitable for treating brewery wastewater.
Referring to fig. 8, the treatment system illustratively includes a filtration apparatus 81, a conditioning tank 82, an anaerobic treatment tank 83, an aerobic biological tank 84, a sedimentation tank 85, and an electrolytic oxidation tank 86 (corresponding to the electrolytic oxidation apparatus) connected in this order. The filtering device 81, the adjusting tank 82 and the anaerobic treatment tank 83 are similar in structure to the aforementioned devices, and are not described in detail herein. The aerobic tank 84 removes organic matter, nitrogen and phosphorus by the action of microorganisms, and the sedimentation tank 85 is used in cooperation with the aerobic tank 84 for sedimentation of activated sludge.
Compared with the existing treatment system, the treatment system has the advantages of stable treatment effect, low running cost, simple and easy operation and maintenance, small occupied area and low investment cost. Besides, the electrolytic oxidation tank has high load capacity, and can flexibly regulate and control complex water quality.
Example 1
Preparing raw material SnC2O4900 parts by weight of Sb2O350 parts by weight of Ni (CH)3COO)2·4H2O1 weight portions, and hydrogen peroxide solution with the concentration of 45 percent 10 weight portions.
Firstly, weighed SnC2O4Added to a reaction tank, 900 parts by weight of deionized water was added thereto and stirred for 5 minutes to obtain a first slurry. The weighed Sb2O3Adding into the reaction kettle, stirring for 8 minutes, and heating to 40 ℃ to uniformly mix to obtain a second slurry. The second slurry was heated to 50 degrees and weighed Ni (CH) was added3COO)2·4H2And O, uniformly stirring to obtain a third slurry. Continuing to heat, adding the weighed hydrogen peroxide when the temperature of the third slurry reaches 90 ℃, and continuing to heatAnd (4) stirring. Stopping heating after 2 hours, naturally cooling the materials in the reaction kettle, and taking the upper suspension after the materials in the reaction kettle are completely precipitated to obtain the required catalyst.
Coating the catalyst on a titanium plate, pyrolyzing at 500 ℃, repeating the coating-pyrolysis process for 8 times, sintering the titanium plate with the catalyst film layer attached, and sintering at 600 ℃ for 80min to obtain a uniform catalyst film layer on the titanium plate.
And observing the sintered titanium plate, and correspondingly detecting, wherein the color of the titanium plate is gray black, and the thickness of the film is 30 mu m.
The titanium plate coated with the catalyst film layer is used as an anode, and the stainless steel plate is used as a cathode. The titanium plate is connected with the anode of a power supply through a lead, the stainless steel is connected with the cathode of the power supply through a lead, the titanium plate and the stainless steel plate are both placed in the water for entertainment landscape to be treated, the power supply is electrified, oxidation and reduction reactions respectively occur near the anode and the cathode, and the purification and pollution discharge treatment of wastewater is realized, and specific data are shown in table 1. The number of electrode assemblies is 20, the power supply is a constant current power supply, the size of the electrode assembly is 100 × 5mm, the current is 80A, and the voltage is 10V. Water treatment amount: 5m3The residence time is 1h.
Example 2
The difference between this embodiment and embodiment 1 is that after the third slurry is prepared, hydrogen peroxide is added to the reaction kettle, the temperature in the reaction kettle is maintained at 70 ℃ by heating, then hydrogen peroxide is added, the reaction is stopped by continuing stirring until the reaction is finished, and after the material is completely precipitated, the upper suspension is taken to obtain the catalyst.
The sintered titanium plate was observed and examined accordingly, and its color was dark gray and film thickness was 15 μm.
The specific data of water treatment are shown in Table 1.
Table 1 results of treating landscape water in example 1 and example 2
| Raw water | Example 1 | Example 2 | |
| COD(mg/L) | 30.2 | 14.5 | 25.6 |
| Total nitrogen (mg/L) | 2.02 | 0.5 | 1.21 |
| Ammonia nitrogen (mg/L) | 0.89 | 0.32 | 0.64 |
| Total phosphorus (mg/L) | 0.39 | 0.09 | 0.21 |
Example 3
In the embodiment, the treatment system shown in FIG. 4 is adopted to treat the sewage in the pond in the scenic spot, and the water quantity is about 500m35m of water circulation in the treatment system3H, the set of electrode assemblies 10 in the treatment system, electrode assembly size 100 x 5mm, current 50A, voltage 6V. The treatment period is 5 days, the clarity of the treated pond water is greatly improved, and the COD concentration, algae density, chlorophyll a, ammonia nitrogen and other water quality of the water body meanMarked by significant improvement.
The preparation method of the anode plate comprises the following steps:
preparing raw material SnC2O41000 parts by weight of Sb2O380 parts by weight of Ni (CH)3COO)2·4H2O3 and 30 parts of 45% hydrogen peroxide.
Firstly, weighed SnC2O4Added to a reaction tank, 1400 parts by weight of deionized water was added thereto and stirred for 6 minutes to obtain a first slurry. The weighed Sb2O3Added to the reaction kettle, stirred for 5 minutes, and heated to 45 ℃ for uniform mixing to obtain a second slurry. The second slurry was heated to 50 ℃ and weighed Ni (CH) was added3COO)2·4H2And O, uniformly stirring to obtain a third slurry. And (4) continuously heating, adding the weighed hydrogen peroxide when the temperature of the third slurry reaches 80 ℃, and continuously stirring. Stopping heating after 3 hours, naturally cooling the materials in the reaction kettle, and taking the upper suspension after the materials in the reaction kettle are completely precipitated to obtain the required catalyst.
Coating the catalyst on a titanium plate, pyrolyzing at 400 ℃, repeating the coating-pyrolysis process for 10 times, sintering the titanium plate with the catalyst film layer attached, and sintering at 650 ℃ for 120min to obtain a uniform catalyst film layer on the titanium plate.
The sintered titanium plate was observed and examined accordingly, and its color was gray black and its film thickness was 25 μm.
The titanium plate coated with the catalyst film layer is used as an anode, and the stainless steel plate is used as a cathode.
Comparative example 1
Compared with the traditional landscape water treatment technology (filtration + UV + nitrobacteria), the method uses a set of 5m3The conventional pond filtering and purifying equipment is used for example, particulate matters in water are removed through filtering, algae in the water are killed through UV, pollutants in the water are removed through nitrobacteria and the like, and the applicable water quantity is only 100m3The treatment period is about half a month.
With the method in this application, 5m is also used3The treatment capacity is compared, the particulate matters in the water are removed by pretreatment (such as filtration), and substances such as ozone, hydroxyl and the like generated by catalytic electrolysis can quickly and efficiently kill the algae in the water body and decompose pollutants such as organic pollutants, nitrogen, phosphorus and the like, and the applicable water quantity is 1000m3The treatment period was 5 days.
The specific data of water treatment are shown in Table 2.
Table 2 results of treating landscape water in example 3 and comparative example 1
| Raw water | Example 3 | Comparative example 1 | |
| COD(mg/L) | 120 | 20 | 80 |
| Total nitrogen (mg/L) | 5.4 | 4.2 | 5 |
| Ammonia nitrogen (mg/L) | 3.1 | 0.5 | 2 |
| Total phosphorus (mg/L) | 0.3 | 0.1 | 0.2 |
Example 4
The aquaculture wastewater was treated by the treatment system shown in FIG. 6.
In this example, the treatment system shown in FIG. 6 is used to treat aquaculture wastewater with a treated water amount of 50m3And/h, wherein the number of electrode assemblies is 50, the size of the electrode assembly is 100 × 5mm, the current is 250A, the voltage is 4V, the residence time is 1h, and the specific structure of the electrode assembly and the preparation method of the anode plate are specifically shown in example 3.
The specific treatment process comprises the following steps:
removing suspended matters in the water by a filtering device;
the catalytic electrolysis device removes organic pollutants, ammonia nitrogen and phosphorus in water.
The specific data of water treatment are shown in Table 3.
Table 3 example 4 results of treating aquaculture water of water works
Example 5
The winery wastewater was treated with the treatment system shown in FIG. 7.
In this example, the treatment system shown in FIG. 7 was used to treat wastewater from a brewery with a treated water volume of 400m3And/h, wherein the number of electrode assemblies is 200, the size of the electrode assembly is 100 × 5mm, the current is 1200A, the voltage is 5V, the residence time is 1h, and the specific structure of the electrode assembly and the preparation method of the anode plate are specifically shown in example 3.
The specific treatment process comprises the following steps:
the filtering device removes larger suspended matters in the water;
air floatation further removes suspended matters in water, and reduces the sludge amount in the subsequent biochemical link;
anaerobic biological treatment can remove partial organic matters, and hydrolyze macromolecular organic matters into micromolecular organic matters, thereby improving the effect of subsequent treatment links;
the catalytic electrolysis device removes organic pollutants, ammonia nitrogen and phosphorus in water and decolors the wastewater.
The specific data of water treatment are shown in Table 4.
Table 4 example 5 results of treating winery wastewater
| Raw water | Example 5 | |
| COD(mg/L) | 8640 | 50 |
| BOD(mg/L) | 4500 | 30 |
| SS(mg/L) | 740 | 30 |
| Chroma (double) | 200 | 20 |
Example 6
The winery wastewater was treated by the treatment system shown in FIG. 8.
In this example, the treatment system shown in FIG. 8 was used to treat wastewater from a brewery with a treated water volume of 200m3And/h, wherein the electrode assemblies are 100 groups, the size of the electrode assemblies is 100 × 5mm, the current is 600A, the voltage is 5V, the residence time is 1h, the specific structure of the electrode assemblies and the preparation method of the anode plate are specifically shown in example 3.
The specific treatment process comprises the following steps:
the filtering device removes larger suspended matters in the water;
anaerobic biological treatment can remove partial organic matters, and hydrolyze macromolecular organic matters into micromolecular organic matters, thereby improving the effect of subsequent treatment links;
an aerobic biological treatment device removes organic pollutants, ammonia nitrogen and phosphorus in water;
the sedimentation tank is used for removing sludge generated in the biological link;
the catalytic electrolysis device removes organic pollutants, ammonia nitrogen, phosphorus and chromaticity in water.
The specific data of water treatment are shown in Table 5.
TABLE 5 results of treating winery wastewater in example 6
| Raw water | Example 6 | |
| COD(mg/L) | 10000 | 60 |
| BOD(mg/L) | 5200 | 30 |
| SS(mg/L) | 830 | 30 |
| Chroma (double) | 180 | 20 |
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present application and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of this invention may be made without departing from the spirit or scope of the invention.
Claims (8)
1. A sewage treatment system is characterized by comprising a pretreatment device and a catalytic electrolysis device which are connected by a pipeline,
the pretreatment device is one or more selected from a filtering device, a coagulating sedimentation tank, an adjusting tank, an acid-base neutralization tank, an evaporation tank, a hydrolysis-acidification tank, a physicochemical pretreatment device and a biological pretreatment device,
the catalytic electrolysis device is provided with a power supply unit, a control unit and an electrode assembly, the electrode assembly is connected with the power supply unit and the control unit,
the electrode assembly comprises an electrode plate and a connecting piece, wherein the electrode plate comprises a cathode plate and an anode plate with a catalyst film layer, the connecting piece is used for connecting the cathode plate and the anode plate with the catalyst film layer, and the electrode assembly is used for carrying out catalytic electrolysis on the sewage to generate oxidizing substances.
2. The processing system of claim 1,
the electrode plates are provided with diversion holes;
the electrode assembly is connected to the housing of the catalytic electrolysis device.
3. The processing system of claim 1,
the electrode assembly comprises at least one cathode plate and at least one anode plate with a catalyst membrane layer;
the connecting piece is also used for connecting a plurality of electrode plates.
4. The treatment system of claim 1, wherein the connector is selected from one or more of an anode plate conductive connector, a cathode and anode plate insulating spacer, and a bracket;
the anode plate conductive connecting piece is respectively connected with the anode plate with the catalyst film layer and the power supply unit;
the negative plate conductive connecting piece is respectively connected with the negative plate and the power supply unit;
the cathode plate and the anode plate are respectively connected with the cathode plate and the anode plate with the catalyst film layer;
the support supports the electrode plate, a polar plate positioning groove is formed in the support and used for fixing the electrode plate.
5. The treatment system according to claim 1, wherein said control unit is adapted to control the rate and amount of production of said oxidizing substance in an analog and/or digital analog manner.
6. The treatment system of claim 1, wherein the biological pretreatment treatment device is selected from one or more of a biochemical treatment, a bioflocculation treatment, a biosorption treatment, an aerobic biological treatment, and an anaerobic biological treatment device,
the physicochemical pretreatment device is one or more of coagulation, air flotation, air stripping, adsorption, ion exchange, evaporation and membrane filtration treatment devices.
7. The treatment system of claim 1, further comprising a post-treatment device connected to the catalytic electrolysis device, the post-treatment device being selected from one or more of a filtration device, a coagulation sedimentation tank, an activated carbon adsorption device, an aerobic microbial treatment tank, and a membrane treatment device.
8. The treatment system of claim 1, wherein the anode plate with the catalyst membrane layer is made by sintering.
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